Pump for thermal jugs



Nov. 26, 1935. J. L. LACKE PUMP FOR THERMAL JUCTS Filed Aug. 17, 1954 A A W INVENTOR J. L.L ache ATTORNEY `Patented Nov. 26, 1935 UNITED STATES l PATENT (')FFICE Claims.

This invention relates to pumps and is directed particularly to a liquid pump for use in combinatio-n with a thermal jug.

The principal object `of my invention is to pro- 5 vide a pump unit which may readily be used in combination with any thermal jug of the usual open mouth type. With jugs of this type it is very inconvenient to pour the liquid from the relatively wide mouth, and spilling and loss of the liquidi often results.

A further object of my invention is to provide a pump for thermal jugs which may be sealed in combination Awith the jug in order that the relatively wide mouth of the jug need not be open to l5 the atmosphere each time it is desired to draw liquid from said jug. Whether used for cold or hot drinks the coldness or heat respectively within the jug is greatly diminished each time the mouth A, of the jug is opened for pouring. I therefore provide a pump which may be easily operated by hand andI which draws the liquid from the jug without opening the large mouth thereof.

A further object of my invention is to provide n means whereby the air which draws back into the jug through the faucet to take the place of the liquid withdrawn will be admitted at a point within the jub which is below the normal level of the liquid in said jug. The air drawing back through g the faucet not only prevents dripping of any rexn'aining liquid from the faucet but said air being admitted within the jug at a point below the level of the liquid within the jug does not tend to vary the temperature of the liquid to such a great degree ,as when admitted through the wide mouth of the jug.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusual of the following specication and claims.

In the drawing similar characters of referenceY indicate corresponding parts in the several views. The figure on the drawing is an elevation of my improved' pump partly in section as mounted in a ing the mouth 2 for engagement with the screw cap ordinarily used, but which for my purposeis replaced by a tapped coupling sleeve 5.

The pump structure which is arranged as 'a single unit for removable placement within the jug, comprises a rigid top disc 6 adapted to extend over the mouth of the jug and having a sealing gasket ring 'l between the disc and jug about the mouth. The disc is preferably provided with a depending annular flange 8 just inwardly of l0 the ring to centrally locate the latter in place. The sleeve has a top inwardly projecting flange 5a which extends over the disc adjacent the rim and engages the same so as to compress the ring and make a tight t when the sleeve is screwed l5 down, besides then preventing any movement of the disc.

The pump itself which mainly depends and is supported from the disc comprises a valve houS.-

ing 9 disposed adjacent thel bottom of the jug 20" when the disc is in place. A pump barrel I0 is secured to and projects upwardly from the housing in axial alinement with the disc. The barrel on one side and adjacent the top is supported from the disc by a brace member il of suitable25 character extending therebetween.

A plunger l2 in the barrel is connected to an operating rod I3 which projects upwardly through a packing gland it of conventional character mounted in the disc. On its upper end the rod 30 carries` an operating knob l5. Secured in and projecting upwardly from the valve housing to one side of the barrel is an outlet pipe It. This extends through the disc with a rigid airtight fit and terminates in a downwardly curved dispens-y 35' ing faucet Il disposed so that its lower end i's outwardly of the adjacent side of the jug.

vThe housing 9 has an intake port I8 in the bottom in alinement withv the barrel, which is normally closed by a glass ball valve I9 in the 40 housing. Below the pipe I6 the housing 9 is provided With an upwardly facing seat 20 for another glass ball valve 2|, there being a communicating passage 22 in the housing from under the ball 2| to the barrel lil below the plunger but 45 above the port I8. The lower end of the pipe I6 is provided with inturned lugs L which limit the upward movement of ball 2|, and prevent the same closing the pipe. The side wall of the housing 9 above the ball 2| is provided with a bleed 50 opening 23.

The jug is provided with the usual hinged bail 24 adapted to be raised when transporting the jug as indicated in dotted lines. The projecting portion of the plunger above the rod and the knob, 68

when the plunger is in its lowest position, is of such height that it does not interfere with this raising of the bail and the grasping of the same by the handle. t

The connection between the pipe I6 and the valve chamber 9 is preferably made by means of a screw connection as shown in the drawing. To enable such connection to be made, while maintaining the pipe I rigid with the disc 6, the brace I I is connected to the disc by a removable bolt 25 so as to allow the disc and pipe to turn as a unit. Also in order to enable the unit to be thus turned, the plunger I2 is withdrawn from the upper end of the barrel, and is replaced therein after the pipe has been rmly screwed down to place.

In use the thermal jug is filled with liquid and the pump unit then inserted through the relatively wide mouth into the jug. The closure disc 6 and gasket 1 resting over the mouth of the jug are then clamped in airtight connection with the mouth by means of the tapped coupling sleeve 5. The liquid is thus sealed from the outside air and therefore the temperature of said liquid will remain relatively constant for a long period of time.

When it is desired to use the liquid in the jug it is only necessary to actuate the operating knob I5 with an up and down motion. 'Ihe upward stroke causes the liquid to be drawn into the pump chamber past the glass ball valve I9 and thedownward stroke seats the ball valve I and `closes `the intake port E3. At the same moment pipe and out of the bleed opening 23 to the interior of the jug. This suction created at the faucet and in the outlet pipe IE5 draws back into the jug any excess liquid that wotdd normally drip from the downwardly extending faucet. The air also being drawn back into the jug at a point relatively close to the bottom of the jug and at a point which is normally below the level of the liquid within the jug makes it possible for all the air being admitted to the interior of the jug to be subjected to the temperature of the liquid therein. The air thus being first subjected to the liquid more rapidly assumes the temperature of the liquid. This makes it possible for the liquid Within the jug to be kept at a relatively cold or holt temperature for a period of time kmuch longer than when the jug is used withc-ut the pump and the lid removed each time the liquid is drawn therefrom.

By providing means whereby the return air is admitted below the level of the liquid the returning air must first overcome the weight of the water at the bleed opening 23 and this results in a very light vacuum remaining within the jug above the surface of the liquid at all times, which tends -to further prevent temperature variation within the jug.

In the construction of my pump I preferably use ball valves which are of glass in order that ,there may be no chipping and resultant rust or I may also use bayonet slots in the coupling sleeve 5 rather than having it tapped as shown.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein. While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is:

1. In combination with a jug having a mouth, a disc `to freely and turnably rest on the rim of the mouth to close the same, a hand dispensing pump supported by and depending from the disc into the jug and including an outlet pipe projecting above the disc and overhanging one side of the same outwardly thereof, and a coupling sleeve removably engaging vthe jug about the mouth and having a flange overlapping the rim of the disc.

2. A hand dispensing pump for insertion in-to a liquid comprising a valve housing, a pump barrel upstanding from the housing, a hand operated plunger in the barrel, an outlet pipe upstanding from the housing and terminating at its upper end in a depending faucet, a passage in the housing between 4the lower end of the barrel and pipe, there being an intake port in the bottom of the housing communicating with said passage, an upwardly opening valve in the housing normally closing said port, and another upwardly opening valve normally closing the passage below the outlet pipe; the housing having a bleed hole in its side wall immediately above the last named valve.

3. A dispensing pump for insertion into a jug hrough the mouth thereof comprising a disc to be removably secured over the mouth of the jug to close the same, an outlet pipe projecting downwardly through the disc from above the same and non-removably secured thereto with an airtight rit, a valve housing into which the lower end of the pipe is removably screwed, a pump barrel se- 'cured in and upstanding from the housing to one side of the pipe and terminating openly at its upper end below the disc, a plunger in the barrel removable from the upper end thereof and a rod on the plunger slida-bly projecting through the disc for operation; the length of the barrel relative to the distance from the topof the barrel to the `disc being such that the plunger may be withdrawn upwardly from the barrel whereby to then enable the housing to be rotated to unscrcw the same from the outlet pipe.

4. A structure as in claim 3, with a supporting member connected to the top of the barrel on the side opposite the outlet pipe and extending upwardly to the isc and being removably secured to the same.

5. A structure as in claim 3, with a valve in the housing removable from the upper end of the same when the outlet pipe is removed, and another valve in the housing removable from the upper end of the barrel when the plunger is withdrawn therefrom.

JOSEPH L. LACKE. 

